Therefore, these products with defined 5' and 3' ends accumulate exponentially with each round of DNA amplification -- that is, for every n cycles of PCR there will be 2 -fold amplification of the specific DNA fragment.
1 By themselves, PVCâs do not present any problem.  Bigeminy, Trigeminy, Quadrigeminy, etc. - ventricular bigeminy is the occurrence of a PVC every other beat, trigeminy is every third beat, quadrigeminy every fourth beat. The main point with these types is that the PVCâs are more frequent in these circumstances. They are otherwise little different from PVCâs.
Without qualification, trigeminy often means trigeminal PVCs, though it can occasionally also refer to trigeminal premature junctional contractions/PJCs or trigeminal premature atrial contractions/PACs. PVCs refer to early depolarizations commencing in the ventricle instead of the sinus node. Ventriculartrigeminy is defined as the occurrence of a PVC every third beat. A high frequency of trigeminy PVCs in heart disease patients has been found to cause ventricular fibrillation and unexpected death.